system_of_numeration/FirstDemo/demoController.java

package FirstDemo;

import javafx.fxml.FXML;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;

public class demoController {

    @FXML
    private TextField initialBaseField;
    @FXML
    private TextField numberToConvertField;
    @FXML
    private TextField targetBaseField;
    @FXML
    private Label resultLabel;

    @FXML
    private void convert() {
        try {
            int sourceBase = Integer.parseInt(initialBaseField.getText());
            String sourceNumber = numberToConvertField.getText();
            int targetBase = Integer.parseInt(targetBaseField.getText());

            int decimalValue = toDecimal(sourceNumber, sourceBase);
            String targetNumber = fromDecimal(decimalValue, targetBase);

            resultLabel.setText("转换成 " + targetBase + " 进制的结果为: " + targetNumber);
        } catch (NumberFormatException e) {
            resultLabel.setText("输入无效，请确保输入有效的进制和数字。");
        } catch (Exception e) {
            resultLabel.setText("发生错误：" + e.getMessage());
        }
    }

    // 将输入转换为10进制
    public static int toDecimal(String number, int base) {
        return Integer.parseInt(number, base);
    }

    // 将转换后的10进制数转换为目标进制数
    public static String fromDecimal(int number, int base) {
        StringBuilder sb = new StringBuilder();
        while (number > 0) {
            int remainder = number % base;
            // 对于大于9的数字，用字母A-F表示
            if (remainder >= 10) {
                sb.append((char) ('A' + remainder - 10));
            } else {
                sb.append(remainder);
            }
            number /= base;
        }
        return sb.reverse().toString(); // 反转字符串以得到正确的顺序
    }
}